Amazon start and stop

This is a sample "script" to schedule start and stop Amazon EC2 instances based on a date time range, i.e. start at 6AM and stop at 0AM.

Have a look at AWS Calculator to see how much you can save by stopping unsed instances from 0AM to 6AM (save 25%) or other date time ranges.

Usage

Checkout amazon_start_stop.

$ git clone [email protected]:phstc/amazon_start_stop.git
$ cd amazon_start_stop

Edit bin/amazon_start_stop and set the constants START_HOUR and STOP_HOUR as you need.

# bin/amazon_start_stop
START_HOUR = 6 # Start 6AM
STOP_HOUR  = 0 # Stop  0AM (midnight)

Heroku

1. Create a Heroku account if don't have one and install the Heroku Toolbelt.
2. Create a new app.

$ heroku apps:create

Deploy

$ git push heroku master

AWS Credentials

Configure your AWS Credentials using Heroku config vars.

$ heroku config:set AWS_ACCESS_KEY_ID=
$ heroku config:set AWS_SECRET_ACCESS_KEY=

# The instance id to start and stop i.e. i-1a1aa111
$ heroku config:set AWS_INSTANCE_ID=

# Leave blank if you don't need to associate an Elastic IP
# (everytime you stop an instance Amazon dissociates Elastic IPs)
$ heroku config:set AWS_ELASTIC_IP=

In development create an .env.

# .env
AWS_ACCESS_KEY_ID=
AWS_SECRET_ACCESS_KEY=
AWS_INSTANCE_ID=
AWS_ELASTIC_IP=

Heroku Scheduler

Add and configure Heroku Scheduler add-on standard (free add-on).

$ heroku addons:add scheduler:standard
$ heroku addons:open scheduler

In the Scheduler Dashboard add a new Scheduler.

Manual execution

In production.

$ heroku run bundle exec ruby bin/amazon_start_stop
# to check the script output
$ heroku logs

In development.

$ foreman start